![Kepler-1513 b: 48.3 Earth Masses](https://cdn.slatesource.com/3/4/2/342dd29f-c466-4d8f-94e4-f12e1fee3357.webp)

# Kepler-1513 b: 48.3 Earth Masses

- [Made in Slatesource](https://slatesource.com/@steph/kepler-1513-b-48-3-earth-masses)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## Ice giant around Kepler-1513

It is 0.77 times Jupiter's radius, closest in size to Saturn, and 48.3 times Earth's mass, at 1.30 g/cm3, less dense than Earth. A year there lasts 160.88 days. The host star Kepler-1513 runs at 5491 K with 0.94 times the Sun's mass.

Radius

8.59 Earth radii

Mass

48.3 Earth masses

One year

160.88 days

Host star

Kepler-1513 at 5491 K

Distance

1139 light-years

Starlight blocked

0.686% at each transit

What has been measured here and what has not

0%

A radius from transit photometry. Yes.

A weight, not just a width. Yes.

A density, the one clue to composition. Yes.

An orbital distance. No.

A measured temperature rather than a derived one. No.

An eccentricity, so we know if the orbit is a circle. Yes.

What a crossing measures

Block a known fraction of a known star and you have measured a width.

Two independent measurements sit behind this page: a dip in starlight for the size, and something else entirely for the mass. Together they make a density.

Found by Kepler in 2016. Kepler stared at one patch of sky for four years, which is why so many of its planets have short periods: a planet only counts once you have seen it cross several times.

Kepler-1513 has 2 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.

Its orbit is noticeably elliptical, eccentricity 0.31, so the starlight it receives changes substantially over one year.

[NASA Exoplanet Archive: every published measurement of this planet](https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-1513%20b?utm_source=slatesource)